jamesbike7 Posted January 11, 2016 Report Share Posted January 11, 2016 Hi I have just bought a St300 and really enjoying it. My question is the bike seems to be running rich as I get quite a bit of smoke coming from the exhaust all the time. I have tried clearing it out but made no difference. I want to try running it a little leaner, any advice? Thanks Quote Link to comment Share on other sites More sharing options...
stpauls Posted January 11, 2016 Report Share Posted January 11, 2016 Is it burning any gearbox oil? If so it could be the crank seal. Quote Link to comment Share on other sites More sharing options...
jamesbike7 Posted January 11, 2016 Author Report Share Posted January 11, 2016 Not sure, not changed the gear box oil yet. Hope it's not the crank seal Quote Link to comment Share on other sites More sharing options...
pauls320 Posted January 11, 2016 Report Share Posted January 11, 2016 Check your fully sealed main bearings for wear too while your in there Quote Link to comment Share on other sites More sharing options...
cascao Posted January 12, 2016 Report Share Posted January 12, 2016 Smoke isn't good guide to carburation. Check your spark plug color and motorcycle behavior. 2015 is too young to crank seal problems. Quote Link to comment Share on other sites More sharing options...
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